Spinning frame



K. HONDA SPINNING FRAME Dec. 5, 1939.

Filed Nov. 30, 1937 Patented Dec. 5, 1939 SPINNING FRAME Kikutaro Honda, Toyonaka, Japan Application November 30, 1937, Serial No. 177,374 In Japan February 16, 1937 4 Claims.

This invention relates to improvements in a spinning frame in which yarn fibers are conducted and drafted between a pair of endless belts or aprons each supported on a roll and a tenser, and the object of this invention is, among other things, to avoid slack of belts and vibration thereof while they are working, which is almost inevitable when .long belts are used for drafting long fibers such as woolen, staple and silk fibers.

In an ordinary apparatus of this type, top and bottom endless belts pass over a top roll and a top tenser and a bottom roll and a bottom tenser, respectively, the bottom roll, generally middle bottom roll, being driven from a power source.

When long fibers such as woolen, staple, and silk fibers are treated by this kind of apparatus, the distance between the roll and the tenser must be longer than for ordinary cases wherein cotton fibers are treated. In such cases, the top and bottom belts are often slacked due to their weight at the part where the fibers are conducted and drafted, and vibrate while they are running, which of course gives an unfavorabe result to the work.

According to this invention, each endless belt encircles a roll and a tenser as usual but the roll is an idle one, not driven from a power source,

and a separate driving roll is provided between the bottom roll and the bottom tenser in contact with the bottom belt, co-operating with a tension roll which effects a tension to the belt by pressing the latter on the driving \roll.

Figure l of the accompanying drawing is a sectional side elevation of the apparatus on the line I--I of Figure 2.

Figure 2 is a sectional end elevation on the line 11-11 of Figure 1.

Figure 3 is a side elevation of the rear part of Figure 1.

Figure 4 shows a modification of a tension effecting mechanism.

Figure 5 is an end view of a weighing lever in Figure 4.

Figure 6 is a part sectional side elevation of another modification.

In Figures 1 and 2, the cradle consists of two sections, a lower one I and and an upper one 2, which are interlocked together by means of knobs 3 on the lower piece and receiving grooves 4 in the upper piece, or vice versa. The lower piece I is firmly fixed to the machine frame or roll stand 5 by means of screws 1, its vertical position relative to the roll stand being adjustable by means of a slot 6 through which a fixing screw 1 extends.

8 is a roll-tenser and 9 is a roll, and their axles 8a and 9a are inserted in slots on the upper margin of the lower cradle at both ends and are kept in position by the lower margin of the upper cradle, while the tenser 8 and roll 9 can be freely 5 rotated on their axles.

The upper cradle 2 is provided with a tenser H3 which has its ends located in a perforation on each side of the cradle and is kept in position by friction at the perforations. In order to assure 10 the friction, one of the ends of the tenser is slotted to secure a spring action. I

The inner side of the upper cradle is provided with a projection I2, which co-operates with a spring E3 to yieldably hold each end of the axle 15 i la on which a roll I i is rotatively mounted. The fixed end |3b of the spring [3 is bent at right angles and inserted into a small hole in the cradle, while the free end l3a is bent downwardly to partly hold the axle I la against the projection I2 so that the axle is kept in its position. The free end of the spring acts to lower the axle I la along the vertical surface of the projection so as to press the roll H on the roll 9, which however is prevented from further movement downward than the position where the spring touches a step of the projection. This is best shown in Figure 2.

I4 is a driving roll formed on a continuous spindle extending the length of the roll stands and is driven by a power source through inter- 3o mediate devices. This spindle has a number of equally spaced fluted sections, and each unit of the drafting apparatus mounted on the roll stand co-operates with each fluted part or roll of the spindle. The lower margins of the bottom cradle 35 are recessed in a U shape for receiving necks of the continuous spindle.

A roll 15 is mounted on its axle which is held at each end by a lever 16 pivoted on alined studs I! on the sides of the cradle. The rear end of 40 the lever I6 is held by a spring l8 which serves to press the roll [5 on the roll l4. The other end of the spring I8 is inserted in a small hole in the cradle.

In Figures 4 and 5,-the roll 15 is mounted on a forked lever l9, and this lever is hung from alined projections 20 on the sides of the cradle, so that the roll 15 is pressed on the roll M by the weight 2| which is adjustably fitted to the lower end 50 of the lever 19.

In Figure 6, the rolls l4 and i5 of Figure 3 are interchanged, and a slot 22 is made on each side of the cradle in order to allow a movement of the roll IS. The lever lfia, stud Ila and spring [8a correspond to the members l6, l1 and I B of Figure 3, respectively.

Endless belts 23 and 24 encircle the roll 9 and the tenser 8 and the roll I! and the tenser I0, respectively. The bottom belt is driven by the driving roll l4 while the top belt is driven as usual by the bottom belt by means of friction at the contacting parts thereof.

In this invention, the tension effecting roll I5 is always pressing the botom belt on the driving roll l4, so that the upper part of the belt, where the fibers are conducted and drafted, makes a tension side.

In a known apparatus, the belt is always driven by a driving roll which is situated at the rear end as the roll 9 in Figure 1, and the upper side of the bottom belt makes a slack side. In case the distance between the driving roll and the tenser is large, slack of the belt is considerable, and unfavorable results are obtained. According to this invention, the working side of the belts make a tension side and therefore the fibers are conducted and drafted straight.

In Figure 1, it is preferable that the diameter of the driving roll 14 is determined in such a way that its top is touching the inner surface of the upper or working side of the belt 23. In this instance, the working side of the lower belt is supported by the driving roll, and is prevented from slacking. Not only this but also the working side of the belt is propelled by the friction with the roll, and its vibration is successfully prevented. Further, if the vertical position of the cradle relative to the roll stand is adjusted so as to have the rolls head make the working side of the belt somewhat convex, the abovementioned results can be more effectively attained.

According to the modification shown in Figure 6, the cradle can be removed from the roll stand together with both top and bottom belts, which is very convenient for cleaning the apparatus.

What I claim is:

1. A spinning frame comprising in combination, an idle roll, a cradle having a tenser mounted thereon, top and bottom endless belts each circling said idle roll and said tenser so as to carry and draft yarn fibers between them, a roll stand, a driving roll journaled on said roll-stand and in contact with the bottom belt at a part between the bottom of said tenser and the bottom of said idle roll, and a tension effecting roll mounted on the cradle for pressing the bottom belt on the driving roll.

2. A spinning frame comprising in combination, an idle roll, a cradle having a tenser mounted thereon, top and bottom endless belts each circling said idle roll and said tenser so as to carry and draft yarn fibers between them, a roll stand, a driving roll journaled on said roll-stand extending through the circle of the bottom belt, and a tension effecting roll mounted on the cradle for pressing the bottom belt on the driving roll from the outside of the belt.

3. A spinning frame comprising in combination, an idle roll, a cradle having a tenser mounted thereon, top and bottom endless belts each circling said idle roll and said tenser so as to carry and draft yarn fibers between them, a rollstand, a driving roll journaled on said roll-stand extending through the circle of the bottom belt so as.to adjustably support the bottom belt at the part where the latter is in contact with the top belt, and a tension effecting roll mounted on the cradle for pressing the bottom belt on the driving roll from the outside of the belt.

4. A spinning frame comprising in combination, an idle roll, a cradle having a tenser mounted thereon, top and bottom endless belts each circling said idle roll and said tenser so as to carry and draft yarn fibers between them, a rollstand, a driving roll journaled on said roll-stand and in contact with the bottom belt at a part between the bottom tenser and the bottom roll, a lever pivoted on said cradle and a tension effecting roll mounted at each end on said lever so as to press the bottom belt on the driving roll by means of a tension effecting device.

KIKUTARO HONDA. 

